import std.stdio, std.array, std.algorithm;

void main() {
	auto str = readln;
	string eng;
	foreach (c; str) {
		if ('a' <= c && c <= 'z') {
			eng ~= c;
		}
		else break;
	}
	foreach_reverse (c; eng) write(c);
	write(str[eng.length .. $]);
}